<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片区域 -->
    <el-card>
      <!-- 提示区域 -->
      <el-alert
        title="添加商品信息"
        type="info"
        center
        show-icon
        :closable="false"
      >
      </el-alert>

      <!-- 步骤条区域 -->
      <el-steps
        align-center
        :space="300"
        :active="activeIndex * 1"
        finish-status="success"
      >
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>

      <!-- tab栏区域 -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
        label-position="top"
      >
        <el-tabs
          :tab-position="'left'"
          v-model="activeIndex"
          :before-leave="beforeTabLeave"
          @tab-click="tabClicked"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>

            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>

            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>

            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>

            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                v-model="addForm.goods_cat"
                :options="catelist"
                :props="{ expandTrigger: 'hover', ...cateProps }"
                @change="handleChange"
              >
              </el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <!-- 渲染表单的item项 -->
            <el-form-item
              :label="item.attr_name"
              v-for="item in manyTableData"
              :key="item.attr_id"
            >
              <!-- 复选框组 -->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox
                  :label="cb"
                  v-for="(cb, index) in item.attr_vals"
                  :key="index"
                  border
                ></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item
              :label="item.attr_name"
              v-for="item in onlyTableData"
              :key="item.attr_id"
            >
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <el-upload
              :action="upLoadUrl"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headerObj"
              :on-success="handleSuccess"
            >
              <el-button size="small" type="primary">点击上传</el-button>
              <div slot="tip" class="el-upload__tip">
                只能上传jpg/png文件，且不超过500kb
              </div>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!-- 富文本编辑器组件 -->
            <!-- 富文本编辑器组件 Two-way Data-Binding -->
            <quill-editor
              v-model="addForm.goods_introduce"
              ref="myQuillEditor"
            />
            <el-button type="primary" class="AddBtn" @click="addShop"
              >添加商品</el-button
            >
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>

    <!-- 图片预览 -->
    <el-dialog title="图片预览" :visible.sync="previewVisible" width="50%">
      <img :src="previewPath" alt="" class="perviewImg" />
    </el-dialog>
  </div>
</template>

<script>
import _ from "lodash";

export default {
  name: "Add",
  data() {
    return {
      activeIndex: "0",
      // 添加商品的表单数据对象
      addForm: {
        // 商品名称
        goods_name: "",
        // 商品价格
        goods_price: null,
        // 商品重量
        goods_weight: null,
        // 商品所属的分类数组
        goods_cat: [],
        // 上传图片的数组
        pics: [],
        // 商品的详情描述
        goods_introduce: "",
        attrs: [],
      },
      addFormRules: {
        goods_name: [
          { required: true, message: "请输入商品名称", trigger: "blur" },
        ],
        goods_price: [
          { required: true, message: "请输入商品价格", trigger: "blur" },
        ],
        goods_weight: [
          { required: true, message: "请输入商品重量", trigger: "blur" },
        ],
        goods_number: [
          { required: true, message: "请输入商品数量", trigger: "blur" },
        ],
        goods_cat: [
          { required: true, message: "请选择商品分类", trigger: "blur" },
        ],
      },
      // 全商品分类列表
      catelist: [],
      cateProps: {
        label: "cat_name",
        value: "cat_id",
        children: "children",
      },
      // 动态参数列表
      manyTableData: [],
      // 静态属性列表
      onlyTableData: [],
      // 上传的图片的url地址
      upLoadUrl: "https://lianghj.top:8888/api/private/v1/upload",
      // 图片上传组件的headers请求头
      headerObj: {
        Authorization: window.sessionStorage.getItem("token"),
      },
      previewPath: "",
      previewVisible: false,
    };
  },
  created() {
    this.getCateList();
  },
  methods: {
    // 获取所有商品分类数据
    async getCateList() {
      const { data: res } = await this.$http.get("categories");
      if (res.meta.status !== 200) {
        return this.$message.error("获取商品分类数据失败");
      } else {
        this.catelist = res.data;
      }
    },
    // 级联选择器选中项变化时触发的函数
    handleChange() {
      console.log(this.addForm.goods_cat);
    },
    //
    beforeTabLeave(activeName, oldActiveName) {
      if (oldActiveName === "0" && this.addForm.goods_cat.length == 0) {
        this.$message.error("请先选择分类");
        return false;
      } else {
        return true;
      }
    },
    async tabClicked() {
      // 证明访问的是动态列表
      if (this.activeIndex === "1") {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: "many" },
          }
        );
        if (res.meta.status !== 200) {
          return this.$message.error("获取动态列表失败");
        } else {
          res.data.forEach((item) => {
            item.attr_vals =
              item.attr_vals.length === 0 ? [] : item.attr_vals.split(" ");
          });
          this.manyTableData = res.data;
          console.log(this.manyTableData);
        }
      } else if (this.activeIndex === "2") {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: "only" },
          }
        );
        if (res.meta.status !== 200) {
          return this.$message.error("获取动态列表失败");
        } else {
          this.onlyTableData = res.data;
          console.log(this.onlyTableData);
        }
      }
    },
    // 处理图片预览效果
    handlePreview(file) {
      this.previewPath = file.response.data.url;
      this.previewVisible = true;
      console.log(this.previewPath);
    },
    // 处理移除图片的操作
    handleRemove(file) {
      // 1. 获取将要删除的图片的临时路径
      const filePath = file.response.data.tmp_path;
      // 2. 从 pics 数组中找到这个图片的对应的索引值
      const index = this.addForm.pics.findIndex((x) => x.pic === filePath);
      // 3. 调用数组的splice方法,把图片信息对象,从pics数组中移除
      this.addForm.pics.splice(index, 1);
    },
    // 监听图片上传成功的事件
    handleSuccess(response) {
      console.log(response);
      // 1.拼接得到一个图片信息对象
      const picInfo = {
        pic: response.data.tmp_path,
      };
      // 2.将图片信息，push到pics数组中
      this.addForm.pics.push(picInfo);
      console.log(this.addForm);
    },
    // 添加商品
    addShop() {
      console.log(this.addForm);
      this.$refs.addFormRef.validate(async (valid) => {
        if (!valid) {
          return this.$message.error("请填写必要的表单项");
        } else {
          // 执行添加的业务逻辑
          // lodash cloneDeep(obj)
          const form = _.cloneDeep(this.addForm);
          form.goods_cat = form.goods_cat.join(",");
          // 处理动态参数
          this.manyTableData.forEach((item) => {
            const newInfo = {
              attr_id: item.attr_id,
              attr_vals: item.attr_vals.join(","),
            };
            this.addForm.attrs.push(newInfo);
          });
          // 处理静态参数
          this.onlyTableData.forEach((item) => {
            const newInfo = {
              attr_id: item.attr_id,
              attr_vals: item.attr_vals,
            };
            this.addForm.attrs.push(newInfo);
          });
          form.attrs = this.addForm.attrs;
          // 发起请求添加商品数据
          // 商品的名称必须是唯一的
          const { data: res } = await this.$http.post("goods", form);
          console.log(res);
          if (res.meta.status !== 201) {
            return this.$message.error("添加商品失败");
          }
          this.$message.success("添加商品成功");
          this.$router.push("/home/goods");
        }
      });
    },
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2];
      } else {
        return null;
      }
    },
  },
};
</script>

<style lang="less" scoped>
.el-checkbox {
  margin: 0 5px 0 0 !important;
}
.perviewImg {
  width: 100%;
}
.AddBtn {
  margin-top: 15px;
}
</style>

// p154
